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40V String Trimmer / Edger

Model: #RY40210B | Home Depot Sku #: 1000742428

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The RYOBI 40V Cordless String Trimmer/Edger was designed for the perfect connection of power and convenience. Part of the 40V Li-ion family, this string trimmer works with nine other RYOBI 40V Cordless tools and runs longer than a gas string trimmer. Featuring a pivoting head, which rotates to a convenient walk-behind edger with a guide wheel for precise cuts, an adjustable 11-13 in. cutting path, and variable speed trigger for complete cutting control, you have exactly what you need to trim under decks & patios and along walkways and driveways. Backed by a RYOBI 3 year warranty, join the family of power and convenience with the RYOBI 40V String Trimmer/Edger. The entire RYOBI 40V family runs off of the same 40V lithium-ion battery platform. The RYOBI 40V String Trimmer / Edger is backed by a RYOBI 5 year warranty.

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Product Videos

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More Run Time than a Gas Trimmer*

*Compared to RYOBI 2-Cycle Gas Trimmer

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Foot Pedal Adjustment Converts Pivoting Head From Trimmer To Edger

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Premium .080 in. Twisted Single Line

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Auto Feed String Head For User Control

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Variable Speed Trigger Allows More Powerful Cutting Or Longer Battery Life

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11–13 in. Adjustable Cutting Width For Longer Run Time Or Wider Cutting Path

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40V lithium-ion high capacity battery and 90 min. charger included

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5 Year Limited Tool Warranty

  • Power Source: 40V Lithium-ion
  • Trigger: Variable Speed Trigger
  • Shaft: Straight shaft with pivoting trimmer head for edging
  • Cutting Swath: Adjustable 11-13in. cutting path
  • Line: .080 twisted line or .065 line
  • Line-Advancement: Auto-Feed
  • Yard Size: Up to 1 Acre
  • Weight: 9 lbs
  • 40V Power Head
  • Ergonomic Front Handle
  • String Trimmer/Edger Attachment
  • Grass Deflector
  • 40V Li-ion battery
  • 40V charger
  • Operator’s Manual

How do I advance the line on my RYOBI Cordless String Trimmer?

NOTE: Your RYOBI Cordless String Trimmer is equipped with an auto-feed head. Bumping the head to try to advance the line will damage the trimmer and void the warranty.

  • With the trimmer running, release the switch trigger.
  • Wait two seconds, and press the switch trigger again.

NOTE: The line will extend approximately ¼ in. with each stop and start of the switch trigger until the line reaches the length of the cut-off blade.

  • Resume trimming.

How do I attach the grass deflector on my RYOBI Cordless String Trimmer?

  • Remove the battery.
  • Remove the plastic hardware bag from the grass deflector.
  • Fit the grass deflector over the string head.
  • Line up the screw holes in the grass deflector with the holes in the motor housing.
  • Install supplied screws and tighten by turning clockwise with a phillips screwdriver.

How do I manually advance the line on my RYOBI Cordless String Trimmer?

  • Remove the battery.
  • Push the black button located on the string head while pulling on the line to manually advance the line.

How do I replace the line on my RYOBI Cordless String Trimmer?

  • Remove the battery pack.
  • Remove the spool from the string head.
  • NOTE: Remove any old line remaining on the spool.
  • Cut a piece of line approximately 9 ft. long. Use only .065 in. round or .080 in. twisted monofilament line.
  • Insert the line into the anchor hole in the upper part of the spool. Wind the line around the supper part of the spool clockwise, as shown by the arrows on the spool. Place line in the slot on upper spool flange, leaving about 6 in. extended beyond the slot. Do not overfill. After winding the line, there should be at least ¼ in. between the wound line and the outside edge of the spool.
  • Replace the plastic retainer spool and the spool cap.

How do I replace the spool on my RYOBI Cordless String Trimmer?

NOTE: Use only .065 in. round or .080 in. twisted monofilament line.

  • Remove the battery pack.
  • Push in tabs on side of spool retainer.
  • Pull spool retainer up to remove.
  • Remove the old spool.
  • To install the new spool, make sure the line is captured in the slot on the new spool. Make sure the end of the line is extended approximately 5 in. beyond the slot.
  • Install the new spool so that the line and slot align with the eyelet in the string head. Thread the line into the eyelet.
  • Pull the line extending from the string head so the line releases from the slot in the spool. Reinstall the spool retainer by dressing tabs into slots and pushing down until spool retainer clicks into place.

How do I start and stop my RYOBI Cordless String Trimmer?

To Start:

  • Press and hold the lock-out button.
  • Depress the switch trigger

To Stop:

  • Release the switch trigger to stop the string trimmer.
  • Upon release of the switch trigger, the lock-out button will automatically reset to the locked position.

How do I store my RYOBI Cordless String Trimmer?

  • Remove the battery from the string trimmer before storing.
  • Clean all foreign material from the trimmer.
  • Store the unit in a place that is inaccessible to children and away from corrosive agents such as garden chemicals and de-icing salts.

What do I do if my RYOBI Cordless String Trimmer won’t start?

Possible Cause—Battery is not secure

  • To secure the battery pack, make sure the e battery pack is snapped into place.

Possible Cause—Battery is not charged:

  • Charge the battery pack according to the instructions included with your battery.

What is the best way to cut weeds and grass using my string trimmer?

  • Keep your string trimmer tilted toward the area being cut
  • Pass the unit from left to right (if using a curved shaft string trimmer) and from right to left (if using a straight shaft string trimmer). By following these directional cutting paths, you will avoid having debris and grass clippings from being directed back at yourself.
  • Use the top of the line to do the cutting. Do not force the string head into uncut grass; this could cause the trimmer to bog down.
  • Avoid trees, shrubs wire and picket fences.

How do I switch from trimming to edging on my RYOBI 24V or 40V String Trimmer?

  • Remove the battery pack.
  • Step down on the foot pedal.
  • Rotate the trimmer head counterclockwise placing the tool in the edger position.

Click the link below to access outdoor products replacement parts schematics and order parts online.

For those customers that prefer ordering by phone, simply contact the Ryobi master parts distributor at toll free 1-877-545-4110, and place your order over the phone.

Visit Ryobi Outdoor Parts Store